Heat-resisting cabinet.



R. H. DICK & AVl G. BLOOMDAHL. HEAT REs|sT|NG CABINET. APPLICATION FILED DEC.31.19I3.

1,252,790. Patented 1311.81918,

5 SHEETS-SHEET 2.

Zl/ ZZ A l f/llll/ll/I/l/////////////I//l////l a. H. DICK al A. G. BLooMnAHL.

HEAT RESISTING CABINET.

APPLICATION FILED DEC. 31. |913.

Patented J an. 8, 1918.l

5 SHEETS-SHEET 3.

W TNELSES R. H. DICK & A. G. BLOOMDAHL.

HEAT RESISTING CABINET.

APPuc/nlqu man nc.3|, ma.

l Patented Jan. 8 1918.

5 SHEETS-SHEET 4.

R. H. DICK & A. G.`BLOOMD`AHL.

HEAT ReslsnNG CABINET.

APPLICATION FILED DEC. 31| i913. Y Patented Jan. 8, 1918.

v 5 SHEETS-SHEETS ATTORNEY sTATEs PATENT oEEIoE.

RALPH H. mex AND ALBINIQBLOQMDAHL, OEMAEIETTA, omo, assumons To THE SAFE-CABINET 00.,.0EMAE1ETTA, omo, a coEPoEATIoN 0E cino.

HEA'TEESISTING CABINET.

To all 'whom z't may concern ABe it known that we, RALPH H. DICK and ALBIN G. BLooMDAHL, citizens of the United States, and residents of Marietta, `Wasl1ing ton county, Ohio, have invented a new and useful Heat-Resisting Cabinet, of which the following is a specification. v'

Ourinvention relates to improvements in heat resisting cabinets and its principal object is to provide a simple device thatcan be constructed economically; which will have stren th and complete rigidity, and which will of obstructing the entranceof heat to its interior and our invention has been especially devised to overcome such shortcomings.

- l/Ve show in thestructure of thi'sapplication, a cabinet in which will be found a complete, integral outer shell ,of metal, on the lnside of which sheets ofinsulating material aresecured. Next to these sheets we place Ya much heavier block of insulating material,

following which is a dead air space providedk at all polnts where it approaches the surface of the outer wall of the cabinet or any openings therein, with insulating material which revents the entrance of heat. y

This dead air space lies between the block insulation and the inner walls of the cabinet i whichare also sheet insulation.

In the drawings herewith Figure 1 is a provided on one side with vertical section from the front to the back of the structure.

Fig. 2 is a vertical section from side to side of the structure online 22 of Fig. 1.

Fig. 3 is a horizontal section. Fig. 4 is a perspective view of the outer shell of the structure. y

Fig. 5 is a slightly enlarged' perspective view ofthe inner shell of the" structure.

Fig. 6 is an enlarged view of the lower left corner of Fig. 3.

Speeication of Letters Iatent.

able to withstand a very high I temperature, without serious damage to it` y outline Fig. 7 is a diagrammatic View of the back `wall ofthe inner shell showing the outline of the .same in vertical cross section.

Fig. 8 1s a diagrammatic view of the back wall of the inner shell showing the outline 'Patented Jan. 8, 1918. Application led December 31, 1913. Serial No. 809,622. i

back wall of the outer shell showing the voutline of the same in horizontal cross sec` tion.

Fig. 11 is a diagrammatic view of the top wall of the inner shell showing the outline of the same in vertical cross section from side to side of the structure.

Fig. 12 isa diagrammatic view of the top wall ofthe inner shell showing the'outline` of the same in vertical cross section from the front to the back of thestructure.

Fig. 13 isa dia ammatic View of the r bottomY wall of the innersshell showing the outline `of the same in vertical cross section` from side to side of the structure.

Fig. `14 is a diagrammatic view of the bottom wall of the in'ne'r shell showing the outline of the same in vertical cross section from the front to the back of the structure. Fig. 15 is a diagrammatic view of one of the side walls of the inner shell showing the of the same in vertical cross section. y f Fig. 16 is a diagrammatic view of one of the side walls of the-inner shell showing section. In constructing our device the outline of the same in horizontal cross an outer shell `21as shown in Fig. 4, is formed, having a. top 22, a bottom 23, and sides 24F-24. This outer shellcan be formed from one sheet of steel or it can be made of two halves weldedto form an integral frame open in the front and'back. To-close the back, a wall member 25, provided with peripheral UY shaped ianges 26, may be formed and inserted through' the front opening of the outer shell 21, vand moved rearwardly therein until the Hanges 26, engage with the rectangular anges27, on the rear of the outer shell. These three thicknesses of metal may then be welded together or fastened in any suitable 4manner to form a tight joint.

his construction forms a very rigid and tight frame and obviates the possibility of warping or buckling in the joint if a high degree of heat is encountered.

On the inside surface of the five walls constituting the outer shell 21, sheets of insulating material 28, are secured in a suitable manner and a heavier block.of insulating material Q9, is used to furnish additional heat resisting means.

The inner shell 30, comprises a top 31, a bottom 32, sides 33--33 and a back 34. The top member 31, as shown in Figs. 1, 2, 10, and 11, is composed of a sheet of metal having at its sides the flanges 35, at its. front edge the flange 36, and at its rear edge the flange 37. The bottom member 32, is provided at its side edges with the flanges 38, at its front edge with the flange 39, and at its rear edge with the flange 40.

The side members 33, are formed with rectangular flanges 41-41 at the top and bottom and the flanges 42-4'2 on their rear and front edges.

The back member 34, is formed with the rectangular flange 43, on every one of its four edges.

It will be seen that when the inner shell 30, is assembled, the flanges 43 on the back member 34, engage with the flange 40'on the bottom member, the flange 37 on the top member and the flanges 42-42 on the side members 33.

The flanges 41-41'on the side' members 33 engage respectively with the flanges 35 on thev ltop member 31 and the flanges 38 on the bcttommember.

Vehave found it advisable in practice to weld together these various wall members after they are assembled for the purpose of obtainingas tight a joint as possible, and a practically integral structure. After assembling and welding, sheets of insulating material 44, are secured to the outer walls of the inner shell 30.

lt is also practical to insert the walls of which the inner shell is constructed, in the outer shell without assembling them outside, the inner top and bottom being positioned first, after which the side walls are inserted, and the inner back placed to hold all the other members in their respective positions.

'We also have found it desirable in some instances to constructfthejnner shell of vthree members instead of five by forming the s top, back and bottom out of one sheet of rear edges and with hook flanges on their front vedges can be positioned to complete the inner shell.

As shown in Fig. 2, we provide in the outer shell 21, support blocks 45, upon which the inner` shell 30 rests when it is inserted in vthe outer shell through the opening in the front. These support blocks ma be made of sheet metal and run from the ront to the rear of the outer` shell of the cabinet. These' blocks are stepped at their inner top edges by recesses 46, and insulating strips 47 are preferably inserted against the vertical walls of said steps and insulating strips 47 are preferably laid flat on the horizontal portions thereof. The top and bottom sheets of the insulatin material 44 may be placed in position before the insertion of the inner shell, and angular strips 48 of thin sheet metal are set in the steps to prevent injury to said insulating material therein when the shell is slid into position.

'I his support block serves to position the inner lshell with relation to the outer shell and being constructed of strong material it lalso prevents injury to the walls of the outer shell by the weight of the inner shell. We employ it in the top of the cabinet, to .pre-

vent injury to the top wall of the outer shell in the event that the icabinet should be turned upside down during transportation or at any other time.

As shown in Fig. 3 we have also devised a new form of tongue and groove construction by means of which a very tight interlocking is obtained between the doors of the cabinet land the adjacent parts when the doors are closed. In devices of this vnature it has always been a difficult matter to construct the said doors and adjacent parts so that the resistance to the entrance yof heat was e ual to that found in the otherparts of the ca inet. This is partly accounted for by the fact that in using a tongue and groove construction of the old type, sufficient space between the lines of the tongues and grooves had to be provided tojpermit a clearance when the door or doors are swinging and the tongues are entering or leaving the grooves, and this space would thereby become a channel through which heat could enter the interior of the cabinet from the exterior.

Expansion, at high temperatures would tend to separate the jambs and the door edges in view of the fact that the means by which the door or doors were locked would operate to hold said doors against bulging outwardly. Y

As shown in Fig. l3 this interlocking tongue and roove construction comprises a side jamb orined of sheet metal, with -a hook flange 49, at its inner edge engaging with the front hook flange 4 2, on the side wall 33, of the inner. shell. Grooves 50-50 with slightly curved walls are formed in the side jamb and the forward edge thereof consists of a straight flange 51, which inte-rfit snugly within the grooves50, when the doors of the cabinet are closed.- Insulatmg ,material 55, may be used around they grooves 50,l and in the tongues 54.

` the rear edge, hook Aflanges 59, and 60 lock On theI forward edge of the member provided with the tongues 54, a 'hook'fiange'v 56, engages -with a similarv flange 57, on the outer wall ofthe door of the cabinet, and on together the inner door wall 61, and the tongue member.-

It will thus be seen that this construction furnishes means by which any-heat liable to enter at the hinge opening would be forced to take a most tortuous route to reach the 4interior ofthe cabinet and in `addition would cause expansion of the Walls of the tongue 54, and the` grooves 50, so that a tight joint would be made. i

Doubledoors are shown in". the drawings j herewith, swinging on thev hinges 62,A and f.

provided with outerl walls 58, and the inner l wallsl. The inner wall has thesheetinsulation 61` andthe outer wall is providedy with sheet insulation 58 and the heavier block insulation 582.

In the center of the front of the 'cabinet wherethe inner edges 63 of the doors` come together it will be seen that thesel edgesV are formed with a number of bends to forma tortuous heat resisting opening from the exterior to the interior of the cabinet.

The inner walllofthe door is'provided at its upper ,and ylower ends 'with hook flanges 64, which en age with similar flanges 65 6 5v at the inner' e ges of thetop and bottom door moldings 66. These top and bottom moldings are bentv toformr horizontal grooves 66 and horizontal ribs or tongues 66", which latter interfit with corresponding grooves 67 and 68 in the topand` bottom' moldings ofthe door jambe. The'l inner edges of these jambl moldings are `pxovidedl with hook fianges 69 and'frespectively which'engage the hook flan es `36`and1gli;5

wi 'alltel' 'shell'.o en on one side, an inner shell the top and bottom walls Io .thefiyrvr Tlie upper end ofthetopmi minates in a rectangular ga tioned between vthe angle iron" 52 f and the lower end'o'fthe bottoniimolding G upper-front wall 72, of thefoute' lterminates similarly in' the flange 73 like.-4 65 wise held between the angle iron 52and the lower front wall 74 `of the outer shell 21.-

We claim: l.r In a `device of the character described thecombination ofa structurally independventA inner shell provided with interlockingl flanges, i/structurally independent outer shell', intermediate members connected with the outer shell and `having' interlocking ,flanges which engage saidV flangesl of the in. 75 nershiell..

, 2.A In akdevice of the character described` thecombination of a structurallyindependent inner shell comprisinginner wall mem bers provided with flanges, a structurallyinf dependentY outer shell comprising a plurality of outer Wall membersand intermediate members connected with the outer shell and provided with flanges which interlock with said flanges of the inner shell. 85 3. In' a device of the character described i the combination of a structurally independ-` ent inner shell provided with mterlocking flanges, a structurally independent outer shell, intermediate .members connected with the outer shell and having interlocking flangeswhich engage said fianges of the in-1 'ner shell, said flanges being interlocked and 4 Y welded together.

v4. In a device of the character describedli the combination of a structurally independf ent inner shellfcomprising a plurality of the inner walls ofthe structure and provided with flanges, a structurally independent outer shell comprising la plurality of the outer walls of the structure, 4intermediate members connected with the outer shell and A provided with interlocking flanges engaging said fianges of the inner shell forming an air space between said outer and inner shells,

and' insulating material between said air space and said inner shell.

5. In a device of the character described thecombination 'of an outer shell open on one side, an inner shell o en on one side, a door jamb connecting. said shells` and providedon its facevwhichmeets the hinged edge ofthe door with similar curved-recesses and. with an intermediate tongue between said recesses, and a door hinged to said jamb curved tongues and with an intermediate recess between said tongues, said tongues of" the door engaging'said recesses of the jamb /and said intermediate tongue of the jamb vengagingqsaid intermediate recess of the door when the'door is closed.

16.'In a" safe cabinet the combination of-an pen: on `one side, a door jamb connecting said ShellsV and provided on-each of its opposite :sides with similar curved lateral recesses and with an intermediate tongue between said.

and provided on its hinged edge with similar v recesses, and a. double door whereof the members are hinged to opposite sides of said jamb and each provided in its hinged edge with curved tongues and with an intermediate space between said tongues, said tongues of each door member engaging said recesses at one side of the jamb andsaid tongue of the same side engaging said intermediate recess of the door member when closed.

7. In a device of the character described, the combination of an outer shell open on one side, an inner shell open on one side, a door jamb connecting said shells and comi'v posed of sheet metal bent to form a recess in an elongated curve on one side of said jamb, the space between the walls of said recess being filled with insulating material, and a door hinged to said jamb and composed' of sheet metal bent to form an elongated curved tongue provided with an insulating filling and adapted to enter said recess when the door is closed. l

8. In a device of the characterdescribed, the combination of an outer shell open on one side, an inner shell open on one side, a

door jamb connecting said shells and composed of sheet metal bent to form recesses in elongated curves on opposite sides ofthe jamb, the spaces between the walls 0f said recesses being filled with insulating material, and a double door whereof the members are hlnged to opposite sides of said "jamb and providedwith curved tongues which enter said recesses when the door members are closed.' v

9. A .device of the character described, comprising an outer shell open on one side, an inner shell open on one side and havin hook fianges'in its walls at said o ening, an a door jamb connecting said she 1s and provided on its inner edge with hook flanges engaging said hook flanges of the walls.

In witness whereof we have `hereunto signed our names this 17th day of December,

1913. y RALPH H. DICK.

ALBIN G. BLOOMDAHL. Witnesses;

A. F. RUSSELL,

En. Horr. 

